diff --git a/example/lib/src/common/constant/config.dart b/example/lib/src/common/constant/config.dart
index bf2cc78..8227600 100644
--- a/example/lib/src/common/constant/config.dart
+++ b/example/lib/src/common/constant/config.dart
@@ -27,6 +27,9 @@ abstract final class Config {
   static const String centrifugeChannel =
       String.fromEnvironment('CENTRIFUGE_CHANNEL');
 
+  /// Username by default.
+  static const String centrifugeUsername =
+      String.fromEnvironment('CENTRIFUGE_USERNAME');
   // --- Layout --- //
 
   /// Maximum screen layout width for screen with list view.
diff --git a/example/lib/src/feature/authentication/widget/sign_in_form.dart b/example/lib/src/feature/authentication/widget/sign_in_form.dart
index 6cdaad5..5410ccd 100644
--- a/example/lib/src/feature/authentication/widget/sign_in_form.dart
+++ b/example/lib/src/feature/authentication/widget/sign_in_form.dart
@@ -76,7 +76,8 @@ class _SignInFormState extends State<_SignInForm> {
       _tokenController = TextEditingController(text: Config.centrifugeToken),
       _channelController =
           TextEditingController(text: Config.centrifugeChannel),
-      _usernameController = TextEditingController(),
+      _usernameController =
+          TextEditingController(text: Config.centrifugeUsername),
       _secretController = TextEditingController();
 
   final FocusNode _endpointFocusNode = FocusNode(),